Millions of straphangers will give top MTA brass a piece of their mind at a series of fare hike public hearings in September.

The transit agency’s board approved the hearings with a unanimous vote at its meeting today. The schedule will be announced soon.

The board also voted to eliminate 202 station agents, bringing the grand total to 462.

Cutting the agents concerned some board members, who said that the intercoms in the system aren’t always working and that there’s a safety risk to riders.

New York City Transit chief Tom Prendergast said he would develop a plan to place three intercoms on station platforms and one outside the turnstiles at areas where the agents are eliminated.

The new intercoms may also be equipped with cameras, so the full-time station agent or MTA representative who answers can see the rider. They may also have separate buttons for information requests and emergencies.

In 2011, the MTA wants to implement a sweeping plan to hike fares in a bid to reap $425 million.

At the hearings, transit officials plan to hear riders’ preference between two fare plans for the weekly and monthly unlimited MetroCards. On the table:

* For the weekly: a fare increase from $27 to $28, with a 22-trip limit on rides; or an increase to $29, with no limit.

* For the monthly: a fare increase from $89 to $99 with a 90-trip limit; or a whopping increase to $104, with no limit.

The unlimited one-day pass and 14-day pass will be eliminated.

Also, the pay-per-ride bonus will plummet from 15 percent to seven percent and the buy-in for that bonus will jump from $8 to $10, and major bridge and tunnel tolls will increase by 50 cents while the minor crossings will increase by a quarter.

And as first reported in The Post, riders who opt to get a new MetroCard instead of replenishing an old one will be hit with a $1 surcharge.

“Riders are paying more and getting less, said Gene Russianoff, of the Straphanger’s Campaign.

Union employees, mostly from TWU Local 100, flooded the hearings and took to the podium to protest the recently-announced fare hikes and layoffs.

“A bunch of rich guys have hijacked the transit system,” said union boss John Samuelsen.